Better PEN15

A better looking PEN15 also let you slap the forward assist for fun!

Change Log

1.0.0 Added Better Pen15 in Firearms------>AssaultRifles.

1.1.0 Added mag release input and tweaked textures.

1.1.1 Texture changes. Added blast_ar_magwell model from ModulAR2, thanks Meat_Banana!

1.1.2 Still tweaking textures.

1.2.0 Added a secret function.