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DDM4 PDW 300 Blackout by SettingHeavy5679 (reddit) .300 BLK Pistol AR-15 Build
With the Daniel Defense DDM4 PDW upper receiver, Geissele SSA-E X Lightning Bow trigger and LMT MARS-L Stripped lower receiver.
Updated
9 of 12 core parts
12 parts|$4148.70
Platform:AR-15Caliber:.300 BLKOverall Length:25"Gas System:PistolLower:Lewis Machine & ToolWeight:6
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Dgeiger3131 / 4
DDM4 PDW 300 Blackout by SettingHeavy5679 (reddit) .300 BLK Pistol AR-15 Build
With the Daniel Defense DDM4 PDW upper receiver, Geissele SSA-E X Lightning Bow trigger and LMT MARS-L Stripped lower receiver.
Updated
9 of 12 core parts
Shop the parts$4148.70
300 Blackout Specs
Platform
AR-15
Caliber
.300 BLK
Overall Length
25"
Gas System
Pistol
Lower
Lewis Machine & Tool
Weight
6
How this build compares to other 300 Blackout builds
From parts picked in GunPartPicker builds · November 2026
The Geissele SSA-E X Lightning Bow is the #1 trigger in 300 Blackout builds on GunPartPicker, picked in about 1 in 8 of them. 2% of 300 Blackout builds share at least 3 parts with this one.
- TriggerCompare with runner upGeissele SSA-E X Lightning Bow#1 · 13%Runner up: Rise Super Sporting /10 Single Stage9%
Often replaces the Geissele SSA X Lightning Bow
- SuppressorCompare with top pickDead Air Nomad 30 Rifle#4 · 5%Top pick: SilencerCo Omega 300 | 30 Caliber17%
- Stock & Brace
Start from this build, swap any part and compare live prices.
See popular 300 Blackout builds300 Blackout Parts List(12 parts)
Est. Total
$4148.70
Lower Receiver
Controls: Ambidextrous
Trigger Pin: .154
Finish: Hardcoat Anodized
Assembly: Stripped
Platform: AR-15
Upper Receiver
$1530.00Out of Stock
Platform: AR-15
Caliber: 300 Blackout
Barrel Length: 7
Gas System Length: Pistol
Assembly: Complete
Trigger
Type: Two-Stage
Platform: AR-15
Pull Weight: 1.5-5 lbs
Pistol Grip
$36.00In Stock
Grip Style: Standard
Color: Black
Material: Polymer
Foregrip
Mounting Interface: M-LOK
Grip Type: Vertical
Storage: Yes
Color: Black
Trigger Guard
$19.99In Stock
Color: Black
Finish: Hardcoat Anodized
Material: Aluminum
Takedown Pin
Pin Type: Pin Set
Material: Steel
Stock & Brace
$339.99In Stock
Color: Black
Stock Type: Collapsible
Material: 6061-T6 Aluminum
End Plate
$37.95Out of Stock
Type: Enhanced
Material: Aluminum
Color: Black
Suppressor
$799.00In Stock
Color: Black
Caliber: Multi
Optic
$539.00Out of Stock
Optic Type: Holographic
Reticle Color: Red
Dot Size: 1 MOA
Color: Black
Light
$131.99In Stock
Light Type: Weapon Light
Output: 625
Mount Type: Rail Mount
Battery Type: CR123A
Color: Black
Mounting Interface: Picatinny
Estimated Build Total
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