"PM-27 GUN OF GUN" is G1 Megatron's gun.
This model have 5mm peg hand grip.
So,any Megatron have this grip(ex:Titin Returns Edition,Combiners Wars Edition,any more)
If your figure cant have this grip,you will scrape and adjust this grip a bit.
PEACE_MAKER_DDMTF create your TF weapons.