SPUHR MP5 / HK33 / HK53 Adjustable 6 Position Drop-in Stock

SPUHR MP5 / HK33 / HK53 Adjustable 6 Position Drop-in Upgrade Stock. SPECS Adjustable 6 Position Drop-in Upgrade Stock for MP5, HK33 and HK53 and Clones Easy installation Lightweight and robust Stock adapter and Stock Tube machined from solid billet aircraft aluminum Castle Nut and 2-Point Receiver Endplate made from nitrided steel Stock made from high-strenght polymer Length: 190-270 mm / 7.48-10.62”, Measured from the center of the take-down pin to the rear of the stock Weight: 455 g/16 oz Compatible accessories, see under this article, accessories The R-315 MP5 Stock Assembly brings the proven design of the R-410 G3 Stock Assembly to the MP5 platform. The R-315 is an updated design of the R-310 MP5 Stock Assembly in that it provides emergency use of the factory iron sights. Using a stock adapter machined from solid billet aircraft aluminum with an integrated buffer, the 6-position adjustable stock is a drop-in replacement of the factory stock and is fully adjustable for length with a non-reciprocating quick-detachable cheek piece, which positions the shooter’s eye in line with optic sights. The check piece can be instantly removed in order to use the factory iron sights if needed.Thanks to the enhanced ergonomics of the stock assembly, recoil management is greatly improved, providing for fast accurate fire even when shooting fully automatic fire. Operation: Install stock assembly using factory HK take down pin. Adjust stock length by pulling down on the rear of the adjustment lever and then slide the stock to the desired length. To remove buttstock from buffer tube, pull down fully on the front of the adjustment lever and then slide stock off the buffer tube. Remove cheek piece by pulling it up and to the rear (pull on the front of the cheek piece). Re-attach cheek piece by sliding it onto top of the stock comb so the rear of the cheek piece grips the comb, then push front of check piece onto the aluminum stock adapter to lock into place.