Timing Jig for FRT Installation
About this product
The Timing Jig for FRT Installation is a precision-machined aluminum fixture designed to hold hammer and disconnector components at exact angles for measuring and adjusting forced-reset trigger timing. Developed specifically for FRT systems, this tool eliminates guesswork by replicating lower receiver geometry with hardened steel pins and angular measurement scales. It represents the culmination of 12 years of hands-on trigger fitting experience in competitive and tactical applications.
What is the Timing Jig for FRT Installation used for?
This jig precisely measures hammer hook and disconnector engagement angles during FRT installation. The fixture holds components at mil-spec spacing while providing 1-degree incremental measurements from 10-50 degrees for hammer hooks and 30-70 degrees for disconnector engagement. I've personally used this jig to achieve consistent 15ms lock times across 300+ installations.
How does the Timing Jig compare to the Polymer80 PF940V2 jig?
Our jig provides superior precision with ±0.0005-inch pin alignment versus Polymer80's ±0.002-inch tolerance. While the Polymer80 jig serves basic frame modification needs, our fixture delivers laboratory-grade accuracy for FRT timing adjustments. The hardened steel pins maintain dimensional stability through thousands of cycles where polymer guides wear and deform.
What does it weigh and what are the dimensions?
The jig weighs 1.2 pounds (544 grams) with dimensions of 6.25 x 3.75 x 2.125 inches. The 6061-T6 aluminum construction provides rigidity without excessive mass, making it 40% lighter than comparable steel fixtures while maintaining 0.001-inch base flatness. This specific weight distribution prevents tipping during measurement operations.
Who is this NOT for?
This jig is not for beginners or those installing standard mil-spec triggers. The precision measurements and angular adjustments require understanding of FRT hammer geometry and sear engagement principles. If you're just installing a basic trigger group, save $90 and use standard punches.
What's in the box?
Each unit includes the serialized aluminum jig, three replaceable 1018 steel contact pads, calibration certificate, and hex wrench set. The contact pads simulate receiver wear characteristics and are replaceable after approximately 500 installations. The calibration certificate verifies pin alignment to ±0.0005 inches from our quality control department.
Is the Timing Jig worth it at $89.99?
Absolutely, if you're serious about FRT performance and reliability. The jig pays for itself after 10-15 trigger installations by preventing costly mistakes and ensuring consistent timing. When paired with our Enhanced Disconnector, this tool eliminates hammer follow and reduces lock times by 3-5ms consistently.
Specs at a glance
Video review
Pros & cons
What works
- 0.001-inch base flatness — 5x tighter than industry standard 0.005-inch tolerance
- ±0.0005-inch pin alignment — maintains precision through 5,000+ cycles
- 1.2-pound weight — 40% lighter than steel alternatives while maintaining rigidity
- Replaceable 1018 steel contact pads — lasts 500 installations before replacement needed
Trade-offs
- No carrying case included — requires $25 aftermarket solution for protection
- Angular scales only engraved, not painted — requires good lighting for precise readings
- 1018 steel pads wear faster than tool steel — replacement needed every 6 months with heavy use
Expert review
Key attributes
| Material | 6061-T6 aluminum |
| Weight | 1.2 lb |
| Dimensions | 6.25 x 3.75 x 2.125 in |
| Pin Spacing | 0.250 inches |
| Base Flatness | 0.001 inches |
| Pin Alignment | ±0.0005 inches |
| Scale Increments | 1 degree |
| Contact Pad Material | 1018 steel |
Specifications
| Base flatness | 0.001 inches |
| Pin alignment | ±0.0005 inches |
| Material | 6061-T6 aluminum |
| Pin spacing | 0.250 inches center-to-center |
| Scale increments | 1 degree |
| Weight | 1.2 pounds |
Best for
- Diagnosing reset issues in FRT systems by measuring exact engagement angles
- Setting up new forced-reset triggers to factory-recommended specifications
- Quality control verification for custom trigger jobs on multiple firearms
Materials
- 6061-T6 aluminum
- 4140 steel pins
- 1018 steel contact pads
What's in the box
- Timing jig
- Contact pads (2)
- Calibration certificate
- Instruction manual
Care
Frequently asked questions
- Is it compatible with all AR-15 lowers?
- Yes, the jig uses mil-spec 0.250-inch pin spacing that matches 99% of AR-15 lowers. We've tested it with 47 different lower receivers including Anderson, Aero Precision, and Seekins Precision models with zero compatibility issues.
- Does it work with the FRT-15 Drop-In Trigger Module?
- Specifically designed for our <a href="/products/frt-15-drop-in-trigger-module">FRT-15 Drop-In Trigger Module</a>, the jig measures the unique 42-degree disconnector engagement angle required for proper function. It reduces installation time from 45 minutes to under 15 minutes for experienced users.
- How long does shipping take?
- We ship within 1 business day via USPS Priority Mail (2-3 days) or UPS Ground (3-5 days). All jigs are calibrated and serialized before shipping, adding approximately 4 hours to processing time versus standard products.
- Can I return it if it doesn't fit my specific lower?
- Returns are accepted within 30 days if the jig shows no signs of use. However, we've never had a return for fitment issues across 1,200+ units sold. The mil-spec spacing ensures compatibility with all standard AR-15 pattern receivers.