![[RA-Tech] CNC Steel Bolt Carrier for KSC M4 GBB[16.5CM]](http://www.sixmm.com/cdn/shop/products/8812__RA-Tech__CNC_Steel_Bolt_Carrier_for_KSC_M4_GBB_16.5CM_1.jpg?v=1609750506&width=1200)
![[RA-Tech] CNC Steel Bolt Carrier for KSC M4 GBB[16.5CM]](http://www.sixmm.com/cdn/shop/products/8812__RA-Tech__CNC_Steel_Bolt_Carrier_for_KSC_M4_GBB_16.5CM_1.jpg?v=1609750506&width=450)
![[RA-Tech] CNC Steel Bolt Carrier for KSC M4 GBB[16.5CM]](http://www.sixmm.com/cdn/shop/products/8812__RA-Tech__CNC_Steel_Bolt_Carrier_for_KSC_M4_GBB_16.5CM_1.jpg?v=1609750506&width=4096)
You sent me the wrong part. You took weeks to respond. You made me pay to return it to an address you provided that was incorrect. You never refunded me. You stopped replying to me, and finally you ask me for a review. Well here it is - not good.
The Grub Screw is missing. So if you want that the Outer Barrel wont turn sideways just unstall a grub screw
It fits fine and protects the Reddot.
It is a nice straight trigger. Works just fine
It has way too much play on a 18c because the cutout for the rear sight is too big. It gits perfectly tight on a 19x though