The KWA MP9 Chamber Base, or Breech Base, is KWA KMP9 Part 19, and replaces a broken base next to the blowback chamber. If the cylinder springs or cylinder on your MP9 broke, you might need this part as well.
The KMP9 Breech Base, Part 19, fits directly behind the external cylinder and supports the NS2 cylinder return springs and the main seal piston lid. The prongs for the return springs can be broken if the MP9 SMG is not assembled correctly, causing this part to need to be replaced.
KWA MP9 NS2 Breech Base Features:
-KWA OEM Quality
-Precision Fit and Finish
-Repairs MP9 and MP9R
-Fits KSC and KWA SMGs
-Mounts NS2 Cylinder Return Springs
All KWA parts are top-quality replacement or repair parts, and are the only parts recommended for use with KWA Gas Blowback Pistols.