Replacement CO2 seal and housing for the Umarex Colt Government M45 1911 A1 CQBP Blowback CO2 air pistol.

Sits in the top of the magazine. Commonly the part at fault if leaking back down into the CO2 chamber.

Please note: This part is held in on an opposite thread (so screwing clockwise will remove the part). We now have tools in stock to remove this part – click here.