LANDOVER, Md. — After his fifth straight 100-yard game, a 49ers franchise record, Frank Gore donned a dark green military-style jacket, green cargo pants and designer jewel-encrusted dog tags.

“They were a pretty tough defense, so I told myself I’m going to wear this — because I felt I was going to come out hunting on Sunday,” Gore said. “It’s my hunting outfit.”

Gore had 107 yards on 19 yards in the Niners’ 19-11 win yesterday over the Redskins.

The 49ers’ sixth straight win leaves intact their commanding lead in the NFC West.

“It was a tough 100. It was a consummate team 100,” coach Jim Harbaugh said. “Not running out of bounds, getting every yard he could get.”

Alex Smith found rookie fullback Bruce Miller for the seventh-round draft pick’s first career touchdown, and David Akers kicked four field goals for the 49ers (7-1). San Francisco’s points-stingy defense forced three turnovers and didn’t allow a touchdown until the final minutes.

The 49ers have their longest winning streak since 1997 and are 4-0 on the road for the first time since 1992 — with all four coming on those 1 p.m. Eastern time zone kickoffs which are supposed to drag down West Coast teams.

The fourth straight loss by the Redskins (3-5) was another episode in offensive futility.

After being shut out by the Bills the previous week, the Redskins got their only points on Graham Gano’s franchise-record 59-yard field goal on the last play of the first half and a touchdown pass to Jabar Gaffney with 1:10 remaining.

“Right now, you take a look at the offense, it’s tough to take,” coach Mike Shanahan said.

Roy Helu, who caught a franchise-record 14 passes coming out of the backfield.