Jersey Small Arms
Gunsmithing - John Torelli
Established
1982
501 Ireland Ave.
Millville NJ 08332
856-825-5766
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Parts Information
Grendel
P10
Pistol
Caliber .380 ACP
10 + 1 capacity
Non-removable internal magazine
1988 to 1991
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Options included detachable grip extender,
Threaded barrel with muzzle
break and "Designator" light assembly.
Speed
Loader came with five M16 Stripper Clips
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Parts List:
100-Barrel 110-Barrel Pin 152-Slide 170-Firing Pin 172-Firing Pin Spring 174-Firing Pin Pin |
222-Frame Screw Middle 224-Frame Screw Rear 226-Frame Bar 252-Trigger 253-Trigger Pin 254-Trigger Axis |
276-Hammer Pin 278-Hammer Axis 280-Slide Stop 284-Slide Stop Spring 300-Grip 310-Magazine Spring |
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180-Extractor 182-Extractor Spring 184-Extractor Plunger 190-Recoil Spring 195-Recoil SpringGuide 020-Frame |
256-Trigger Spring 257-Trigger Screw 258-Trigger Plate 260-Trigger Bar 271-Hammer 275-Hammer Spring |
315-Magazine Follower 317-Magazine Plate |
* Check here for Serial Number Information
INTRODUCTION
The Grendel P-10 is a radically new type of semi-automatic pistol.
The P-10 is especially suited for selfdefense or home protection by
individuals with only limited training in the use of a hand gun. Like a
double-action revolver, the P-10 has no external safety. Also like a
revolver, the P-10 uses no loose magazines, but has a high capacity
magazine integrated in the grip.
The P-10 is designed and manufactured in the United States. Extensive
research and development, especially in the fields of composite materials
and ignition dynamics, have been incorporated into this firearm. Thanks to
the advanced design and modern computerized machinery, the P-10 can be
manufactured at a low cost without compromising quality in materials or
workmanship.
DESCRIPTION
The P-10 is a semi-automatic pistol chambered for the .380 ACP
cartridge and operated by blowback. The firing mechansim is double-action
only, with a novel low inertia safety hammer system. The magazine is
loaded from top and holds 10 rounds. A speed loader is also available. The
bottom of the grip is designed to accept an extension or our "MMH" target
illumination system.
CONSTRUCTION
The P-10 has five main component groups: barrel, slide, frame, grip
and firing mechansim. The barrel is turned and milled from SAE 4140
ordnance steel with a tensile strength of over 140,000 pounds per square
inch. The bore is of standard SAAMI dimensions. The slide is milled from
solid stock of La Salle Stressproof™ steel, and contains the firing pin
and extractor. The frame is an all steel construction which holds the
barrel, firing mechanism, and also forms the magazine lips, slide rails,
and ejector. The frame is stamped with the serial number. The grip is made
of a polymer metal composite, creating a unique combination of rigidity
and impact strength. The grip also forms the magazine and triggerguard. It
attaches to the frame with screws. The metal inserts in the grip also
facilitate X-ray detection. The trigger with a lever connects via a
bar/disconnector to the hammer. The hammer is driven by a novel
powerspring. Virtually the whole mass of the hammer is centered around
it's axis. The light weight firing pin transmits the energy of the hammer
to ignite the primer.
SAFETY
To achieve highest operator safety, combined with ease of handling,
the P-10 has no manual safety and the hammer is never cocked. Very much
like a hammerless revolver. The hammer is of a novel design. Compared to a
conventional hammer, the P-10's is extremely light and consequently,
operates at very high velocities. It is driven directly by a special
powerspring on the same axis. Furthermore, the hammer's mass is
concentrated around its axis giving an inertia in the critical direction
of the firing pin close to zero. The velocities necessary to fire a
cartridge with the low mass hammer/firing system are so high that they
cannot even be approached by the slide's action or an accidental fall. A
direct blow to the hammer is impossible, as it is enclosed by the slide
and grip. The hammer's energy is transmitted to the primer through a
proportionally light weight firing pin.
DISASSEMBLY
Clear the P-10 of ammunition. Pull the Slide back until the Barrel
Retaining Pin is aligned with the hole in the Slide. Push the Barrel Pin
out either side. Restrain the slide and ease it off the front of the
receiver. The Recoil Spring, Recoil Spring Guide and Barrel are easily
removed from the slide. The P-10 is now field stripped for cleaning. It
is not recommended that you proceed any further with disassembly. However, should you need
to replace a broken part refer to the following directions.
Slide Group: Use a small tool to push the
Extractor Plunger into the Slide and remove the Extractor from it's recess
in the Slide. Remove the Extractor Plunger and its Spring from the Slide.
Drive out the Roll Pin that retains the Firing Pin and it's Return Spring
and remove the Firing Pin and Spring out the back of the Slide.
Cut a slave
pin of .1 inch diameter to a length of .71 inch.
It will be useful in removing and assembling the Receiver Group.
Receiver Group: Remove the small Hex Screw at the
front right of the Grip Frame which secures the Trigger Pin. Pull the
Trigger about half way. The
Trigger Bar (Part #260) and the Trigger Lever (Part #258) should pop up
out of the Grip Frame. Remove the Trigger Lever. Do not try to
remove the
Trigger Bar at this time. Remove the Right small Hex Screw at the
back of the grip frame and insert the Slave Pin you made. As you
remove the Left
small Hex Screw push the Slave Pin into the hole. This will
help keep the hammer spring in place as you remove the Receiver.
Remove the large Hex Screw
in the middle of the receiver assembly. Remove the Receiver Assembly
upwards and out of the Grip Frame keeping a hand over the front part to
catch the
Trigger Bar/Slide Stop Lever Spring (Part #284). (This spring can launch
itself quite a distance. Don't try this over a carpeted area, or you could
loose
the spring.) The Slide Stop Lever is easily removed.
Take note of the relationship of the Coiled Hammer Spring and Hammer
in the Receiver.
Remove the Magazine Follower downwards. Push the Hammer Pin out
towards the left and remove the Hammer, Spring and Magazine Guide Assembly
down and out
of the Receiver. These parts are now easily separated. Remove the Trigger
Stop Pin and push out the Trigger Pin to the left and remove the Trigger
down
and its Return Spring up.
William Wood has a YouTube video up about
disassembling the P12 that's well worth watching.
Here's the link:
Grendel P12 Broken Hammer Spring
REASSEMBLY
Receiver Group:
Remember, you were warned about taking
the P-10 completely apart.
01) First, if you removed it,
reinstall the Trigger and its Return Spring.
02) Next, replace the large
Magazine Spring back into the Grip Frame onto its stud.
03) Put the Trigger Bar (Part
#260) into position in the Grip Frame. Do not secure it to the Trigger
yet.
04) Put the Hammer Spring (Part
#275) against the Hammer with the small hook in the center bearing on the
pin of the Hammer. Slide the assembly into the Receiver.
Push the Hammer Retaining Pin (Part #276) into place. The open end of the
hook on the Hammer Spring fits on top of the Frame Bar (Part #226).
05) Insert the Frame Bar being
certain that the Hammer is underneath of it. If installed correctly
the Frame Bar will be in-between the top hook of the Hammer Spring
and the front side of the Hammer. It is necessary to rotate the
Hammer to put the proper tension on the Hammer Spring. Use the Slave
Pin to secure the Frame Bar
and clamp the Receiver into a vise.
06) Rotate the Hammer and slip the
Magazine Guide (Part #317) down from the top and over the Hammer.
Make sure the hook grabs the Frame Bar.
07) Push the Magazine Follower (Part #315) up from the
bottom into place in the Receiver. This will help keep everything in
place.
08) Remove the assembly from your
vice keeping pressure on the sides of the Receiver with your fingers.
09) Put the Slide Stop Lever
(Part #280) into the Receiver with it's small tab protruding through the
opening and resting on top of the Magazine Follower.
10) Carefully align the assembly
with the Grip Frame and insert it into position.
11) Thread in either one of the
small Hex Screws that hold the receiver at the rear. As you turn in
the Hex Screw it will force your Slave Pin out the other side.
Remove the slave pin and thread in the other Hex Screw. Do not
tighten them fully yet.
12) Screw in the large Frame
Screw (Part #222) about a third of the way. Do not tighten it down
yet.
13) The Slide Stop Lever/Trigger
Bar Spring (Part #284) fits into a rectangular opening in the front of the
Receiver.
The left extension of the spring bears down on the top of the Slide Stop
Lever while the right pushes up on the Trigger Bar.
Keep the Trigger Bar up and out of the way and shove the Spring into the
opening with the left side bearing down on the Slide Stop Lever.
Make sure it's in place as you push the Receiver assembly the rest of the
way into the Grip Frame. Tighten the Frame Screw the rest of the
way.
14) Place the Trigger Bar Plate
(Part #258) onto the Right Side of the Trigger Bar with its bearing studs
facing in. Pull the Trigger about half way
and the studs will align with notches on the Trigger Pin. Make sure the
Trigger Bar is on top of its spring. Secure with the smallest of the Hex
Screws.
Tighten, but don't overtighten, the two small Hex Screws at the rear of
the Grip Frame. To check your assembly, push the Hammer back slightly and
partially pull the Trigger. It should begin to cock the Hammer.
Slide Group:
Insert the Firing Pin and its Spring into the back of the Slide and secure
with the Retaining Pin.
Slip the Extractor Spring and Plunger into place and push the Extractor
backwards and into its slot until it snaps into position.
Replace the Barrel, Recoil Spring and Guide back into the Slide.
Make certain the Barrel and Recoil Spring Guide are exactly centered or
they will not seat properly.
Line up the holes and replace the Barrel Pin.
An
evolution of the P-10 was the P-12 with an 11 round
detachable magazine
which was made from 1991 to 1995. Most of the parts will interchange and assembly and dissasembly are identical with the exception of the Extractor. |
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Another
model of the Grendel is the P-30 in caliber .22 Magnum, also manufactured from 1991 to 1995. The P-30 held 30 rounds in a detachable magazine and was available with a five or eight inch barrel. Sorry, but I have no parts or sources for parts for this pistol.
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Serial Number Location on P10 / P12 Pistols
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GRENDEL, INC. P.O Box 908 Rockledge FL 32955 USA (Do not write to this address. Obsolete.) |
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