MP5/HK33/53 Stock Assy, Low

The R-315 MP5 Stock Assembly offers the proven design of the R-310 MP5 Stock Assembly but with a quick detachable cheek piece - allowing for the 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 fully adjustable for length and has a non-reciprocating cheek piece (additional heights available) which positions the shooter’s eye in line with optic sights.

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.
Will fit HK MP5, HK33, and HK53 (and clones).

Length: 190-270 mm/7.48-10.62” *
Length of Pull: 290-370 mm/11.42-14.57"
Weight: 455 g/16 oz

* Measured from the center of the take-down pin to the rear of the stock.

MP5 Stock Assembly 
Drop-in Stock Assembly for HK MP5/HK33/HK53 and clones 
Length: 
Weight: 
EAN: 
190-270 mm/7.48-10.62” * 
455 g/16 oz 
7340150717247 
* Measured from the center of the take-down pin to the rear of the stock. 
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.