Grendel P30
Encyclopedia
The Grendel P30 is a semi-automatic pistol chambered in .22 Winchester Magnum Rimfire. Designed by George Kellgren, it uses a 30-round Zytel
Zytel
Zytel is a trademark owned by DuPont and used for a number of different high strength, abrasion and impact resistant thermoplastic polyamide formulations of the family more commonly known as nylon, often with varying degrees of fiberglass, from 13% to 60%, added in for additional stiffness.Some of...

 magazine and was available with a 5 or 8 inch barrel. A carbine version (R-31
Grendel R31
The Grendel R31 is a semi-automatic carbine that shoots the .22 Winchester Magnum cartridge.-In More Detail:The 30 round detachable box magazine is housed in the pistol grip. It also has a skeleton butt that can be extended using the two tubes that are housed on either side of the receiver. Most...

) was also offered. It was manufactured from 1990 to 1994.

The P-30 uses a straight blow-back
Blowback (arms)
Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gases created by the ignition of the propellant charge....

 operation, with the assistance of a fluted chamber to reduce case friction during extraction.
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