Description

Windham Weaponry WW-15 conversion ref.: UR9SFSB-450M cal.450 Bushmaster 9”:

The Windham Weaponry company was founded by Richard E. Dyke in 2011 at the location of Bushmaster, which he owned from 1976 to 2006 and which he agreed to sell to an investment fund to retire . This fund having decided to move Bushmaster from Maine to New York in 2011, leaving the employees out of work, Richard E. Dyke, despite his age, decided to found a new company so that his former team could resume service. Windham Weaponry is the legacy of the sum of their experiences.

Main features:
– Semi-automatic direct throttle conversion for AR-15.
– 9″ barrel (1:24” pitch) chambered in 450 Bushmaster (450 Thumper), MilSpec CMV steel (Mil-B-11595E) protected by double nitriding (Melonite QPQ) giving it very high resistance to wear and corrosion
– 11/16″ x 24Tpi barrel threading
– 3-chamber compensator
– Cylinder head in 7075T6 aircraft alloy machined from forged parts
– Cylinder head in special Carpenter C-158 steel –
This conversion is compatible with all AR15 receivers whose dimensions are MilSpec
– Barrel extension and receiver with M4 type feed ramps.
– Breech box with closing assistance pusher and ejection window door.
– Laser engraving of the caliber on the receiver
– Windham Weaponry floating handguard with picatinny upper rail and M-LOK system on the sides and below.
– This small diameter handguard offers excellent grip.
– Type III MilSpec anodizing on receiver and handguard.
– Comes with a 5-shot magazine and Magpul MBUS sights.
– Caliber: 450 Bushmaster (450 Thumper)
– Weight of a weapon equipped with this conversion: approximately 2.63 kg depending on the equipment.
– Length of a weapon equipped with this conversion: approximately 66cm depending on the stock.
– Made in the USA

– Conversion classified in category B5 (out of quota).

Note on the caliber 450 Bushmaster:
This American caliber was originally designed by Tim LeGendre for Colonel Jeff Cooper who was looking to improve the performance of the AR-15. As a result, the cartridge is compatible with the magazines of this platform (the 10-shot magazines then have a capacity of 5 shots, those of 20 shots accept 9 cartridges and those of 30 shots become 13 shots in 450 Bushmater) , but today there are also specific magazines, optimized for this caliber. The case comes from that of the 284 Winchester cut to 43.2mm. It is slightly conical and ranks among the ”straight” sockets because it has no shoulder. The projectile used is .452” caliber.