Trinity Trigger PTR 9K 3-Position FRT Trigger Housing
Complete PTR 9K / SK trigger housing with Trinity's forced reset system and an MP5 trip
- Price
- $896
- Brand
- Trinity Trigger
- Category
- Triggers
Featured in
Features
- •3-position (Safety/Semi/Forced Reset)
- •Carbon-fiber-reinforced ABS housing body
- •Dual metal plates at the FCG interface
- •MP5 trip included; no buffer or buffer tube
- •PTR 9K / SK only
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Overview
The Trinity Trigger PTR 9K 3-Position FRT Trigger Housing is a complete replacement trigger housing for PTR Industries' K-length MP5-pattern pistols. The selector runs Safety, Semi, and Forced Reset. In the forced reset position the bolt's rearward travel pushes the trigger forward into reset after each shot, so every round still takes its own trigger press. Trinity includes an MP5 trip, and the buyer chooses a curved or flat trigger and a black or gold cam.
The body is 3D-printed from carbon-fiber-reinforced ABS, with two metal plates set into the fire control group interface for rigidity and alignment. Trinity tunes it for the shorter bolt travel of K-length receivers, and this configuration runs without a buffer or buffer tube. Fitment is specific to the maker as well as the length: Trinity excludes full-size PTR models, the HK SP5 and SP5K, and AP5-family clones, each of which needs its own housing.
It is the turnkey option for a PTR 9K owner who does not want to source an AR-FCG lower, trip kit, and selector separately. It costs more than the Mars Trigger PTR lower or a Rare Breed FRT-RD3 cassette. Trinity does not ship to 18 states or Washington D.C. Verify current federal, state, and local law before purchase.
Key Features
- Complete trigger housing with Trinity's forced reset system
- 3-position selector: Safety, Semi, Forced Reset
- 3D-printed carbon-fiber-reinforced ABS body
- Dual metal plates reinforce the fire control group interface
- MP5 trip included; K configuration runs without a buffer or buffer tube
- Curved or flat trigger; black or gold cam
- Backed by Trinity's lifetime warranty
Pros
- +Turnkey: no separate lower, trip kit, or selector to source or time
- +Built specifically for PTR K-length receivers
- +Metal plates stiffen the fire control group interface of the polymer body
- +Lifetime warranty on Trinity products
Cons
- −Costs more than the Mars complete lower or a Rare Breed FRT-RD3
- −Housing body is printed polymer; metal is limited to the FCG reinforcement plates
- −PTR 9K / SK only; it will not move to a full-size PTR, SP5K, or AP5-P
- −Trinity does not ship to 18 states or DC
Detailed Specifications
- triggerType
- Complete forced reset trigger housing (FRT)
- positions
- 3-position (Safety/Semi/Forced Reset)
- Material
- 3D-printed carbon-fiber-reinforced ABS body with dual metal FCG reinforcement plates
- included
- Forced reset system, MP5 trip (no buffer or buffer tube in the K configuration)
- options
- Trigger: curved or flat. Cam: black or gold
- compatibility
- PTR 9K / SK in short (K) configuration only; not PTR full-size models, HK SP5 / SP5K, or AP5 / clone platforms
- warranty
- Lifetime warranty
- restrictedStates
- Trinity does not ship to CA, CO, CT, DE, FL, HI, IL, MD, MA, MI, MN, NV, NJ, NY, OR, RI, VT, WA, or DC; verify current federal, state, and local law before purchase
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Build Your Custom Configuration
Add the Trinity Trigger PTR 9K 3-Position FRT Trigger Housing to your build and see how it enhances your platform.