SCOOPHEAD
Single-Shot Breach-Loaded Compact or Bullpup Magazine-Fed Configuration
Description
The Scoophead is a compact reinterpretation of the Hammerhead platform designed for either single-shot breach loading or a bullpup magazine-fed configuration. The shifted barrel layout maintains a long internal barrel path within a reduced footprint, offering strong performance while remaining simple to assemble, service, and modify. Files are complete and standalone, with attachments included for magazine-fed use and clip-on dart staging.
Hardware Kit (Bonnethead / Scoophead / Scalloped)
| Part | McMaster # | Qty required |
|---|---|---|
| 4-40 3/8" FH (steel) | 90273A108 | 24 |
| 4-40 1" FH (steel) | 90273A115 | 12 |
| 10-32 3/4" FH (steel) | 90273A831 | 6 |
| 10-32 1.25" BH (steel) | 91440A516 | 6 |
| 10-32 1.75" BH | 90279A837 | 6 |
| 10-32 1/8" thick nut | 90480A195 | 12 |
| 10-32 Flange nut | 90389A113 | 3 |
| 10-32 threaded rod (3ft) | 98838A011 | 30 |
| Catch Washer | 7421K12 | 1 |
| 1.5" OD washer | 92141A035 | 1 |
| 4" Spacer (steel) | 93265A042 | 1 |
| 3" Spacer (steel) | 93265A034 | 4 |
| 1" Spacer | 93330A476 | 3 |
| Small Spring (3/4") (36" *5) | 9662K16 | 6 |
| K26 (11") (5.5" piece) | 9637K26 | 1 |
| K25 (11") (5.5" piece) | 9637K25 | 1 |
| 1.375" ID Plunger Tube (3ft) | 53945K21 | 5 |
| Alum tube 0.509" ID (3ft) | 9390N15 | 21 |
| Press Insert for plastic | 92395A112 | 6 |
| 1.375" OD O-RING | 9452K87 | 6 |
| 0.5" OD O-RING FAT | 9452K18 | 6 |
| 0.5" OD O-RING | 9452K21 | 6 |
Key Features
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Single-shot breach-load or compact bullpup magazine-fed setup
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Long internal barrel path in a compact frame
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Spacer configuration uses 3"+3" and 4" components to maintain rigidity
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Straightforward build with fewer large components
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Includes clip-on dart-holding accessories for staging and transport
Spacer Note
Dual 3" spacers must be tolerance-matched to create a true 6" smooth spacer. 6" spacer alternatives exist but are higher cost. Expect some spacer surplus if building your own matched