• An A2 Rear Sight specially modified to accept interchangeable “micro-aperture” peeps. Its windage and elevation mechanisms feature either 1/2 or 1/4 Minute Adjustments with each click of the windage knob or elevation dial. Precision machined micro-aperture inserts are available in .036" - .040" (standard, and most commonly selected by competition shooters) - .046" and .052" sizes. Please specify when ordering.
  
• A Competition Front Sight specially ground for optimum visual clarity - available in your choice of three different widths (.052"; .062" [standard] or .072" - please specify when ordering). It is secured within the front sight base by a set screw to avoid the possibility of any movement once you have established your zero.
  
• A 20" Bushmaster Extra Heavy Competition Barrel - a full 1" in diameter under the handguard. Precision button rifled in a 1 x 8" right hand twist with an 11 crowned competition muzzle, they are machined from Chrome-Moly Vanadium barrel steel and are hardened to Rockwell C26 to 32 - superior to stainless barrels! As these barrels are shipped well oiled, they should be thoroughly cleaned before shooting - follow all break-in and maintenance instruction included with your rifle.
  
• In the Upper Receiver, the bolt is matched to the Barrel Extension for maximum strength and accuracy.
  
•  The Lower Receiver houses a finely honed Competition Trigger that is factory set for a DCM legal 3.5 lb. 1st Stage and a 1 lb. letoff (2nd Stage).
  
• The forearm features stock style outer grips over a “free floater” tube that does not contact the barrel. The sling swivel is attached to the leading edge of the tube so as to avoid any possibility of barrel deflection.
  
• The buttstock has been improved for competition with the addition of a 3+ lb. lead counterbalancing weight which can be trimmed by the competitor to achieve proper balance, and adds to the solid feel of this special competition model.

All competition parts are available individually. We recommend the U.S. Gov't. M16 A2 Technical Manual for assembly work - see our Gunsmithing Tools & Supplies Section. Call the Bushmaster sales line for help in specifying exactly the components you need to win!