Yes i know I am , but to be honest bud your post just looks like another classic example of a “someone please spoon feed me the answer I’m looking for !” Post .
Out of curiosity I looked to see what your gun is as I didn’t actually know what it was , and I discovered it’s an M4 , An M4 FFS ! The most populist gun in Airsofting there must be literally hundreds of variations of it and possibly thousands of ‘bolt ons’ for it so yea you may think I’m being shitty posting a disguised google search link suggesting you look for the answer but really bud ?