U Bullpup


A cross between the Caliburn and Talon Claw in a bullpup platform.
*Blaster is not usable without a foregrip attachment*

Barrel Shroud
Grip Insert (+$6.00)
Iron Sights (+$4.00)
Rail Riser (+$10.00)
Suppressor SCAR (+$15.00)
Plunger Tube Cover (+$5.00)
Carbon Fiber Wrap (+$15.00)
Additional Internal Upgrades
Product total
Options total
Grand total


– Listing is for a fully assembled and tested U Series Bullpup blaster
– Primary color applies to Coupler, Grip5AR, Magback, Nameplates, and Pcap
– Secondary color applies to DoomS, ARGrip, Trelease, Krelease, Plunger, Sear, Trigger, RamBase, Endcap, EndCover, and Magfront
– Muzzle is orange by default
– Pump action with lower picatinny rail for foregrips
– Compatible with both Talon and Katana style magazines.
– Includes upgraded o-ring tipped ramrod by default
– 14″ 0.527″ ID default barrel
– Default spring 8-3/8″ K25. Compatible with 9″ length K31, K26, and 8-3/8″ length 788 springs.
– Base performance on-par with Rainbow Pistol (approx 200FPS with default set-up).
– 26″ overall length
– Handle can be removed to be replaced with other AR style grips (sold separately)
– Ramcore come with o-ring notch and Vanguard (which enables magazines to be loaded with the breech closed)

Original U Bullpup design by captainslug released under CC-NC license. It is also based off of the Talon Claw design by aasamba released as public domain.

Used with permission. A percentage of all sales will go to captainslug.

**Carbon Fiber Wrap is a sticker add-on. Durability not guaranteed.


We’ve modified the U Bullpup slightly from the original to give you better performance.

Significant changes include:
– Thickened walls around hexstandoffs to increase part durability
– Modified rambase for better seal between ramcore and base
– Modified railsegments to remove brim
– Added modified ButtPlate for use with Turf Longshot springs
– Added modified Pcap plate for use with Aluminum Pcap Plate reinforcement

Additional information

Weight 2 lbs
Dimensions 20 × 4.5 × 1.5 in


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