JComer

always wanted one and just picked one up I know nothing about them so thanks for your patience 1. what does it take to change the vertical front grip to a horizontal? 2. the EZ pull spring set does it help any with trigger pull? 3. what is the different in the 1928 A1 butt stock profile compared to the 1927 A1 profile 4. does anyone know why someone would pack the buttstock whole for the cleaning rod with grease? Thanks

I am confused it's my understanding that if it comes from the factory like the new ones it's legal with a 16" barrel, now to my question if you buy the detachable kit and add it to your rifle does it require a SBR stamp? if so why, Thanks