Editing BT-4

The '''BT-4''' was a family of .68-calibre paintball markers from [[BT Paintball]], built around the mechanical semi-automatic '''BT-4 Combat'''. A court filing dated 6 September 2005 describes and identifies packaging for the Combat, placing the line on the market by that date. BT's 2006 manual documents the early series.[1][2]

== Design ==

The BT-4 used an inline blowback action and accepted CO₂ or compressed air. The Combat had a removable barrel, a sliding feed elbow, accessory rails and a removable grip frame. The feed elbow could be moved to expose the breech for cleaning. BT also offered an electronic grip frame as an upgrade.[2][3][4]

== Configurations ==

In June 2007, retailer Paintball-Online documented the Combat, SWAT, Banshee, Assault and Ironhorse as configurations of the same platform. The [[BT Delta]] added MP5-style furniture. The [[BT-4 ERC]] packaged the Combat with an electronic grip frame, Rip Clip loader and Apex barrel.[3][5]

== References ==

# [https://insight.rpxcorp.com/litigation_documents/3928534 Tippmann Pneumatics et al. v. BT Paintball Designs et al., amended complaint, 6 September 2005, paragraph 35]
# [https://www.paintballsolutions.com/pdf/manuals/bt/BT-4-2006-manual.pdf BT Paintball Designs, BT-4 owner's manual, 2006]
# [https://paintballonline.wordpress.com/2007/06/29/more-bt-markers-and-accessories/ Paintball-Online, More BT Markers and Accessories, 29 June 2007]
# [https://www.paintballsolutions.com/pdf/manuals/bt/BT-4-manual.pdf Empire Battle Tested, BT-4 Series Markers owner's manual]
# [https://paintballonline.wordpress.com/2007/12/06/bt-delta-erc-and-rip-clip-paintball-markers-and-loaders/ Paintball-Online, BT Delta, ERC and Rip Clip Paintball Markers and Loaders, 6 December 2007]

[[Category:Paintball equipment]]