Does anyone have any information on the M249 SPW? There is not any printed material on this weapons program from the Army or Marines.
Here is some info from Wikipedia:
M249 Special Purpose Weapon
This lightweight and shorter version of the M249 is designed to meet USSOCOM special operations forces requirements. The carrying handle, magazine insertion well, and vehicle mounting lug all have been removed to reduce weight. As a result, the SPW cannot be mounted in vehicles or use M16 magazines. Picatinny rails were added to the feed cover and forearm for the mounting of optics, lasers, vertical foregrips, and other M4 SOPMOD kit accessories. The SPW has a detachable bipod. The SPW's lightweight barrel is longer than that of the Para model, giving it a total length of 908 mm (36 in) and a weight of 5.7 kg (13 lb).
From American Special Ops:
M249 SPW A special version of the M249 designed for use by Special Operations Forces (SOF). Gone are the folding handle, magazine well and vehicle-mounting lug. Newly added are a set of Pictatinny rails for mounting accessories. The SPW features a collapsible buttstock. The SPW's barrel is longer than the M249 Para but shorter than the full-length SAW.
Images from the internet: