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Rosco Manufacturing
Overview
The Rosco Manufacturing Bloodline SP-BL-82-300-BCG-GTP Carbine KIT is a bolt carrier group. Compare prices from multiple merchants and find the best deal.
Prices checked
Rosco Manufacturing Bloodline SP-BL-82-300-BCG-GTP Carbine KIT ranked #61 of the 258 bolt carrier groups builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #53 of the 551 bolt carrier groups builders have added. Builds with this bolt carrier group are nearly all chambered in 300 Blackout, mostly on pistol-length gas (73%, then carbine-length 20%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $325.30, with no real sale all month. Buying today, the lowest price is $325.30 at Classic Firearms, which matches the best price we saw in October.
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