Description
Anybody who's spent time behind an AR-10 knows the barrel is the heart of the whole rifle, and dragging an unguided rod through it is one of the fastest ways to wear out your accuracy. The Wheeler Delta Series AR-10 Bore Guide solves that by keeping the cleaning rod aligned as it enters the chamber, so it can't bow, rub, or gouge the throat and chamber during a scrubbing session. It's a small tool that quietly saves you from expensive mistakes.
What the Wheeler AR-10 Bore Guide Does on the Bench
This guide is precision CNC machined from aluminum with a durable anodized finish, so it holds up to repeated cleanings and won't get chewed up by solvent. It drops into the upper and can be held in place by closing the dust cover, which engages a groove machined into the body. For uppers running without a dust cover, chemical-resistant O-rings keep it seated where it belongs. That secure fit is the whole point, because a guide that shifts around isn't doing its job.
Solvent Control With the Delta Series Bore Guide
One of the details worth calling out is the integrated solvent port sitting toward the rear of the guide. It extends out of the upper so it stays easy to reach while you work, letting you wet patches without pulling everything apart. The guide also extends into the chamber to cut down on solvent seeping back into the action, which means less cleanup and less chance of gunk migrating into your trigger group.
This is built specifically for .308 and 7.62 NATO chambered AR-10 and LR pattern rifles, with an inner tube diameter of .250 inches. Pair it with a good one-piece rod, some bronze brushes, and quality patches, and you've got a maintenance setup that treats your barrel right for the long haul.
Key Specifications
- Manufacturer: Wheeler Engineering
- Manufacturer Part Number: 156777
- UPC: 661120567776
- Model: Delta Series
- Product Type: Bore Guide
- Fits: AR-10 / LR platform, .308 / 7.62 NATO
- Material: CNC Machined Aluminum
- Finish: Anodized
- Inner Tube Diameter: .250 inch
- Retention: Dust cover groove plus chemical-resistant O-rings
- Solvent Port: Integrated, rear-mounted
- Quantity: 1
What’s Included
- 1 Wheeler Delta Series AR-10 Bore Guide
Frequently Asked Questions
What rifles does the Wheeler AR-10 Bore Guide fit?
It's designed for AR-10 and LR pattern rifles chambered in .308 Winchester or 7.62 NATO. It seats into the upper receiver and locks in either by dust cover engagement or its O-rings. If your rifle runs on the larger .308 platform, this is the guide you want rather than the AR-15 version.
Why do I need a bore guide for cleaning my AR-10?
Running a cleaning rod without a guide lets it flex and bow inside the barrel, where it can rub or gouge the chamber and throat over time. That kind of wear robs accuracy from an otherwise good barrel. The bore guide keeps the rod aligned so all your effort goes straight into the bore, which also makes pushing tight patches easier.
Does the solvent port on the Delta Series bore guide actually help?
It does. The port sits toward the rear and extends out of the upper, so you can apply solvent to your patch without disassembling anything. It also directs the flow into the bore instead of letting it drain back into the action, which keeps your trigger group and lower cleaner.
What is the inner tube diameter of this bore guide?
The inner tube measures .250 inches, which works well with standard cleaning rods and jags for .308 and 7.62 NATO. It is not intended for use with a 6.8mm jag. Match it with a quality one-piece rod for the smoothest results.





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