First Factory

For TM M4 MWS GBBR hopup unit only

For Marui GBBR M4 

AEG-spec buffer tube not included. Stock not included.

First Factory MWS Upgrade High Bullet Floating Valve by Laylax (4570189747981) MRSP $23.00

For TM spec M4 receivers

Converts TM M4 Next Gen and SCAR-L Next Gen to use conventional M4/M16 magazines

-14mm thread

For Next Gen 416

For Marui Next Gen 416

Stock not included. For Marui Scorpion vz.61 and mod M. compact electric machine gun only.

For Marui MP5K/PDW. Buttstock not included

For airsoft only

Also known as MP5 Mag Catch Plus Ver.2 in the Laylax/First Factory catalog, however that name might be confusing.*

Stock not included.

for Marui and similar 3pc style outer barrel. Replaces the base with a reinforced part to reduce wobble.